| 摘要 |
A system for determining the spatial position and orientation of each of a plurality of bodies. Each one of the bodies has at least three markers in a predetermined, relative geometric relationship. The markers are adapted to emit energy in response to an activation signal and/or to reflect energy impinging ups such passive marker from an activatab le energy source. A common energy detector is provided for detecting the energy emitted by the active marker and the energy reflected b y the passive marker. A common processor is provided. The processor has a memory. The memory has stored therein the predetermined, relative geometric relation of the markers for each one of the bodies. The processor compares the stored predetermined geometric relation o f the markers for each of the bodies with the energy detected by the energy detector to identify the bodies emitting, or reflecting the detected energy. With such an arrangement, a body can be tracked using a very simple sequence of operation in real-time with robust positive marker identification by taking advantage of a simple marker placement methodology. Multiple bodies can thereby be tracked simultaneously .
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